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Can the star point of a 400 volt three phase generator be grounded to produce 240 volts?
Wiki User
∙ 8y ago
A 400/230-V three-phase generator hase three line terminals, together with a neutral terminal. The line voltage (i.e. the voltage between any pair of line terminals) is 400 V, while the phase voltage (i.e. the voltage between any line terminal and the neutral terminal) is 230 V.
Wiki User
∙ 9y ago
Wiki User
∙ 8y agoYes, a 400 v three-phase system has 230 v between each live and neutral. A 400v generator can supply three separate single-phase 230 v circuits.
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What is the difference between a phase to ground connection and a grounded wye connection?
A 'grounded-wye' connection describes a wye-connected supply, whose star-point (or common point) is grounded. This is essential in order to ensure stable phase voltages. I'm not sure what you mean by a 'grounded-phase' connection; if you mean a 'grounded-line' connection, then this is a short-circuit to ground from a line conductor.
How does a motor-generator set work?
As the name implies, a motor-generator set utilizes an electric motor as the prime mover to drive a generator. The motor and generator can be mounted on a common shaft or they can be mechanically connected through a coupling, belt drive system or reduction gear.In all cases, the motor requires a source of power (from whichever electrical supply service is available) and it drives the generator to produce the required electrical output power. For instance, if a single-phase supply service is the only service available at a location, the generator's output could be three-phase ac which could be used to supply power to machinery which has three-phase motors, etc.If a site has equipment which requires only direct current the generator could be one that produces dc. That is a less common setup because a full-wave rectifier could easily be used to produce plain dc from ac, but a motor-generator set can still be used for very specialized applications which need highly accurate control of a dc motor under varying load conditions. The Ward Leonard Drive System is a specialized example of such a motor-generator set. (See the Related Link below for more information.)Nowadays, because high-power electronic inverter units are sold to produce a three-phase service from a single-phase service, motor-generator sets are used mainly for very specialized industrial sites, for engineering development and for scientific research applications.It should be noted that there is no need to use a motor-generator set or an inverter unit to produce single phase from three-phase because any one line of a star-connected three-phase service, along with a neutral wire connected to the central star point, can easily be used as a single-phase service.The Related Links below give a lot more information about motor-generator sets.
Wiring diagram to convert a 3 phase 480 volt generator to 277 volt?
You should not need a wiring diagram. If the generator has a star point (wye) connection then the phase voltage to ground (star point) is 277 volts. 480/1.73 = 277.
Why delta connection is made in primary side of step down transformere?
not necessarily if the power source is delta the y voltages (or phase to ground) may not be predictable there is 3phase delta with one leg grounded there is 3 phase 240 delta with center of one phase grounded for 120/240 single phase for lights primary on these is all 240 delta y would be 0 120 132 240 or 277 depending on that ground point
How do you get a 220 volt single phase from 380 volt 3phase synchrounos generator?
220 volt single phase from 480 volt 3 phase that one wire taken one phase and second wire connected in earth point. we get 220 v The above answer is incorrect, one phase from a three phase 480 volt system will give you 277 volts to ground. You must use a transformer to get the voltage you need.
Why is one terminal of a three-phase AC generator grounded?
only neutral point is gronded not a terminal ,
What is the difference between a phase to ground connection and a grounded wye connection?
A 'grounded-wye' connection describes a wye-connected supply, whose star-point (or common point) is grounded. This is essential in order to ensure stable phase voltages. I'm not sure what you mean by a 'grounded-phase' connection; if you mean a 'grounded-line' connection, then this is a short-circuit to ground from a line conductor.
What can happen if a utility-sized electrical generator has an ungrounded neutral?
What you need to define is the statement "utility- sized electrical generator". It depends on what the generators output is used for as to the way it is internally wired. In some configurations there is no neutral to ground as in a Delta configuration.If the generator is configured for a Wye output and the neutral centre tap is not grounded there will be a floating voltage between the generator and the utility system ground. It is for this reason that the generator's neutral point is grounded to bring the floating voltage down to zero volts to ground.
How does a motor-generator set work?
As the name implies, a motor-generator set utilizes an electric motor as the prime mover to drive a generator. The motor and generator can be mounted on a common shaft or they can be mechanically connected through a coupling, belt drive system or reduction gear.In all cases, the motor requires a source of power (from whichever electrical supply service is available) and it drives the generator to produce the required electrical output power. For instance, if a single-phase supply service is the only service available at a location, the generator's output could be three-phase ac which could be used to supply power to machinery which has three-phase motors, etc.If a site has equipment which requires only direct current the generator could be one that produces dc. That is a less common setup because a full-wave rectifier could easily be used to produce plain dc from ac, but a motor-generator set can still be used for very specialized applications which need highly accurate control of a dc motor under varying load conditions. The Ward Leonard Drive System is a specialized example of such a motor-generator set. (See the Related Link below for more information.)Nowadays, because high-power electronic inverter units are sold to produce a three-phase service from a single-phase service, motor-generator sets are used mainly for very specialized industrial sites, for engineering development and for scientific research applications.It should be noted that there is no need to use a motor-generator set or an inverter unit to produce single phase from three-phase because any one line of a star-connected three-phase service, along with a neutral wire connected to the central star point, can easily be used as a single-phase service.The Related Links below give a lot more information about motor-generator sets.
Wiring diagram to convert a 3 phase 480 volt generator to 277 volt?
You should not need a wiring diagram. If the generator has a star point (wye) connection then the phase voltage to ground (star point) is 277 volts. 480/1.73 = 277.
How does a motor generate?
As the name implies, a motor-generator set utilizes an electric motor as the prime mover to drive a generator. The motor and generator can be mounted on a common shaft or they can be mechanically connected through a coupling, belt drive system or reduction gear.In all cases, the motor requires a source of power (from whichever electrical supply service is available) and it drives the generator to produce the required electrical output power. For instance, if a single-phase supply service is the only service available at a location, the generator's output could be three-phase ac which could be used to supply power to machinery which has three-phase motors, etc.If a site has equipment which requires only direct current the generator could be one that produces dc. That is a less common setup because a full-wave rectifier could easily be used to produce plain dc from ac, but a motor-generator set can still be used for very specialized applications which need highly accurate control of a dc motor under varying load conditions. The Ward Leonard Drive System is a specialized example of such a motor-generator set. (See the Related Link below for more information.)Nowadays, because high-power electronic inverter units are sold to produce a three-phase service from a single-phase service, motor-generator sets are used mainly for very specialized industrial sites, for engineering development and for scientific research applications.It should be noted that there is no need to use a motor-generator set or an inverter unit to produce single phase from three-phase because any one line of a star-connected three-phase service, along with a neutral wire connected to the central star point, can easily be used as a single-phase service.The Related Links below give a lot more information about motor-generator sets.
Why delta connection is made in primary side of step down transformere?
not necessarily if the power source is delta the y voltages (or phase to ground) may not be predictable there is 3phase delta with one leg grounded there is 3 phase 240 delta with center of one phase grounded for 120/240 single phase for lights primary on these is all 240 delta y would be 0 120 132 240 or 277 depending on that ground point
How do you obtain a 230 volts single phase supply from a 400 volts three phase four wire supply?
400 volt three phase on a grounded system is 230 volt single phase, with each phase 120 degrees apart. So, if you have a 400 volt, three phase four wire service (grounded service), you can pull one phase off and reference to the neutral for 230 volt service. Note this may not allow 115 volt service, unless there is also a center tap for each phase.
What element has a low melting point and boiling point exists as a diatomic molecule in the gas phase and readily reacts with metals to produce a salt?
Iodine
What does boiling point have to do with phase change?
At the boiling point the liquid phase is changed to a gas phase.
How do you get a 220 volt single phase from 380 volt 3phase synchrounos generator?
220 volt single phase from 480 volt 3 phase that one wire taken one phase and second wire connected in earth point. we get 220 v The above answer is incorrect, one phase from a three phase 480 volt system will give you 277 volts to ground. You must use a transformer to get the voltage you need.
What type of three phase voltage provides a stinger or high leg?
Currently, in popular usage, 3 phase systems are arranged in a "Y" or "star" configuration with the same voltage from each leg to ground. Primary sides of transformers are in a delta, "triangle", configuration but this is not the utilized side. In some old systems, the utilized system is delta with the mid point of one winding grounded. The phases at each end of this winding will measure half the volts to ground as from phase to phase. The phase farthest from the grounded winding measures a much higher voltage to ground than phase to phase since, in simple terms, it is measuring the voltage across 1 and 1/2 windings.
